It’s always a good idea to reapply your sunscreen according to the manufacturer’s recommendations on the packaging. How long do reef-friendly sunscreens last? “Though there’s more research to be done, the latest suggests sunscreen containing non-nano zinc oxide and titanium dioxide could be the better choice for ocean swimming,” Dr. Sunscreens made with non-nano zinc oxide and titanium dioxide tend to be labeled as such. So, what’s a beach-goer to do? Check your sunscreen’s ingredient list before you pack for your ocean vacation. “Zinc oxide and titanium dioxide tend to leave a white cast on skin, so sunscreen makers have looked to nano and micronized versions of these ingredients to reduce the white cast and create formulas that are easier to rub into your skin.” “Nano means the particles are synthesized to be very, very small,” Dr. ![]() The terms “nano” and “non-nano” refer to the particle size of titanium dioxide and zinc oxide, two of the most popular active ingredients that give mineral sunscreens their SPF. “Physical sunscreens-also called mineral sunscreens-offer protection for coral reefs while also protecting your skin.” What does nano vs. “We want our patients and customers to be safe at the beach, while also protecting the environment,” Dr. These laws have beachgoers on the hunt for reef-safe sunscreens or reef-friendly sunscreens. Some popular vacation destinations, including Hawaii, have passed laws that ban the sale of sunscreens that contain some or all of these ingredients. ![]() These ingredients include oxybenzone, octocrylene, octinoxate, PABA, nano-titanium dioxide and nano-zinc oxide. ![]() Some sunscreen ingredients may have the potential to harm coral, algae, fish and other marine life, according to the National Ocean Service. Either way, we’re here to dig into the topic of reef-safe sunscreen and answer some of the most frequently asked questions about them with the help of board-certified dermatologist and LovelySkin CEO Dr. If you have an ocean getaway on the books, there’s one question you need to ask yourself when stocking your beach bag with sunscreen for the day: Is my sunscreen reef-safe? Maybe you’re staying at a resort that requires the use of reef-safe sunscreen, or you’ve heard the buzz about reef-friendly sunscreens and aren’t sure what to make of it.
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